Safety appliance for connecting-rods.



E. D. CHURCH.

SAFETY APPLIANCE FOR CONNECTING RODS.

* APPLICATION FILED MAR. 18, 190"].

Patented Apr. 13, 1909.

WWQJJM %W I v summon, n. c.

UNITED STAT .s

PATENT enrich.

EDGAR D. CHURCH, OF SAOINAW, MICHIGAN, ASSIGNOR TO AMERICAN SANDSTONEBRICK MACHINERY COMPANY, OF SAGINAW, MICHIGAN, A CORPORATION OFMICHIGAN.

SAFETY APPLIANCE FOR CONNECTING-RODS.

To all whom it may concern:

Be it known that I, EDGAR I). Cnunorr, a citizen of the United States ofAmerica, residing at Saginaw, in the county of Saginaw and State ofiiiichigan, have invented certain new and useful Improvements in SafetyAppliances for Connecting-Rods, of which the following is aspecification, reference being had therein to the accompanying drawings.

The invention relates to a safety appliance for use in connection withpower machines, such as presses and the like, designed to relieve theconnecting rod from excessive tensile strains occasioned bydisarrangement of the machine elements, or the clogging of the machine,and thus prevent breakage of parts, and consists in the novel and simpleconstruction of the safety means and in the peculiar arrangement andcombination of its parts, as more fully hereinafter set forth andillustrated.

In the drawings,Figure 1 is a perspective view of the safety appliance,associated with a connecting rod or pitman; Fig. 2 is a vertical centralsection therethrough is a cross section; and Fig. 4. is a diagrammaticview illustrating the application of the safety mechanism.

In the drawings thus briefly described, the

I reference-letter A represents a connecting rod, shown in Fig. 4 asforming the connection between a crank A on a shaft A and a crank arm BThe rod is provided with a head member B, which in this instance isthreaded upon the rod and is of yoke-shaped configuration, within itsopening B being arranged the complementary bearings blocks or elementsC. The bearing block having flanges c which overlap the wall of the 0ening B, thereby constituting an interloc ring connection between thehead and bearing blocks. The head, as shown, is formed with anexternally-threaded extension D, which, is bored and internally threadedto receive the threaded end E of the connecting rod. The bearing blocks,as illustrated, are removable, and are adapted to be retained within thehead by means that, under excessive strain, will give way to permit ofthe detachment of the bearing, and thus prevent breakage of the machineparts. As illustrated, this connection comprises a retaining member orcap F, having a reduced portion I extending partly Within the headopening in contact with one of the bearing blocks O, and

Specification of Letters Patent.

Application filed March 18, 1907.

ferent size.

Patented April 18, 1909.

Serial No. 363,016.

{ yielding members,-in the form of springs I G,having connection withthe cap or retainer and the head properl These springs are of the leaftype, adapted to be secured by a suitable bolt, as H, to the head, andat their free ends are turned inwardly, as at I, to form an engaginghook for the retainer. For the purpose of varying the am unt ofresistance to the strains imposed upon the connecting red, I providemeans for varying the tension of the spring,in the form of members J, onopposite sides of the head, having openings to permit of the extensiontherethrough of the springs, and set-screws K on said members adapted tobear upon protecting plates 76 of any suitable construction and adaptedto rest against the spring. Means are also provided for adjusting theconnection between the bearing and connecting rod head, so as toaccommodate bearings of dif- The means shown consist of a grooved collarL on the extension D of the head, into which inturned projections M onthe inner spring ends extend, the bolt openings 0 being elongated topermit of the adjustment by the longitudinal movement of the springs.

From the description of the safety appli ance, its operation will beobvious, excessive strains imposed upon the connecting rod causing thebearing and its cap to be forced outwardly from beneath the springs,thus yielding to the strain and preventing the breaking of other partsof the machine.

strain is varied by means of the set-screw K, and the position of thesprings varied, and the proper adjustment made for the bearing, byrotating the grooved collar the required amount.

What I claim as my invention is,-

1. A device of the character described comprising a connecting rod, ayoke-shaped head for the rod, a cap member bridging the space betweenthe arms of the yoke member and automatically releasable retaining meansfor the cap.

2. A. device of the character described, comprising a connecting rod, ayoke-shaped head, a sectional bearing in the head, a cap member bridgingthe space between the arms of the yoke arranged to hold the bearing inplace, and automatically releasable retaining means for the cap.

8. In a device of the character described,

The amount of resistance offered to the a onn cti g rod, head. m mbe ifl d w; i i flfi fi ja delly r bveb biriiig in the head, a springpressed retainer for the bearing carried by the head, and an adjustablecollar also upon the head for adjusting the retainer. r

4. In adevice of the character described, a connecting rod, ayoke-shaped head mem; ber thereon, an automatically removable bearing inthehead, a cap member-engaging the headopeningand forming a retainer forthe bearing, and leaf springs a dust a bly connected, tothe head,forming a yielding, c011- nection betweenthe ,latter and the retainer. Aeonnecting rod coniprising a threaded end e ection, a yqke shaped headengaging said section, bearings in the head, a retainingcap for thebearings extending Within the head opening, an adjustable grooved collarupon the head, endear springs adjustably connected to the head, havinginterned end portionsengaging the bearing retainer and collar. v 6. Incombination, a yoke-shaped head adapted to support a bearing therein, acap member engaging the head opening and adapted to form a retainer forthe bearing, and leaf springs connecting respectively With the headandccap member. v V

Intestirnony whereof I aflix my signature 30 in presence of tWowitnesses.

EDGAR D. CHU ii OH.

"Witnesses:

MA X E EDITH ZOELLER.

